lama hasan, reporting live for us in jerusalem. thank you. >>> the other big story here at home, holiday getaway gridlock. it is, yes, a very big thanksgiving tradition, as much as the turkey and all the trimmings. and this year, it was no different. >> that's for sure. air travel hit a major snag with planes trying to get in and out of chicago's o'hare airport, were grounded by a thick layer of fog. hundreds of flights were canceled. hundreds more, delayed. and that triggered a ripple effect across the country. >> travelers in and out of the l.a.x. area found the added headache of a strike by all of these airport workers. not only was plane traffic snarled. but roadways near the airport were backed up for hours. and this morning, police have arrested about a dozen people, still on the street outside l.a.x., for violating a dispersal order. >>> and on the east coast, train travelers had to cope with a full-on shutdown of the nation's busiest rail station, new york's penn station. and it happened at the height of the evening rush. a